Received a call from an unknown person/business on my cell phone.

Started calling me today.  I think it is part of the other numbers that randomly call me after signing up with careerbuilders.  I haven't picked up.  First time no voicemail.  Second time voicemail was an immediate hangup.  The other number that has been bothering me, which is up to 5 days now, is 9727635529.

This number has called me 6 times the past two days. With no voicemails

It is a solicitation from a school if you call it back you can opt to be removed from their records by pressing 9

Thanks, I just did what you said. Let's see they really stop calling me, or give me a call from different number.